Concrete-mixer.



G. F. NYE.

CONCRETE M'IXER.

APPLICATION FILED APR.13, 1914.

1,142,61 3. Patented June 8, 1915.

GEQORGE rymrn, or KEARNES EBRASKA;

CONCRETE-MIXER.

' Specification of Letters Patent. 7 Patented June 8, 1915.

Application filed April 13, 1914. Serial No. 831,662.

Nebraska, have invented certain new and useful Improvements in Concrete-Mixers, of which the following is a specification.

This invention relates to concrete mixers and has special reference to those mixers which are employed to produce a batch, as distinguished from continuously operating mixers.

A particular object of the present invention is to provide simple and efficient means whereby after the batch has been mixed it maybe readily discharged from the mixing drum.

A secondary object of the invention is to provide means whereby the discharge of the material from the drum during the process of mixing will be prevented and afterthe mixing has been completed the batch may be discharged by merely reversing the direction of rotation of the drum.

These stated objects. and such other objects as will incidentally appear. as the description of theinvention proceeds, are attained inan apparatus of the type illus-v tratcd in the accompanying drawings, and the invention consists in certain novel features which will hereinafter be first fully described and then more particularly pointed out in the claims.

In the drawings,Figure 1 is a side elevation, with parts broken away, of a concrete mixer embodying my present improvements;

Fig. '2 is a detail perspective view of the-discharge end of the drum showing parts broken away and looking toward the receiving end of the drum; Fig. 3 is a similar view looking toward the discharge end of the drum.

In carrying out my invention, I employ a supporting frame 1, which is preferablv mounted upon wheels 2 so that it may be readily moved from place to place and the mixture discharged at the point of use. Upon this frame I mount a plurality of small supporting rollers 3 which engage tracks 4 provided upon the exterior circumference of the mixing drum 5. The drum is also provided with an external annular gear 6. which meshes with a iiinion 7 on the end of a driving shaft 8 which is journaled upon the supporting frame, to which power may be applied in any convenient or preferred manner. i

The mixing drum 5 is preferably conical and may be so arranged upon the supporting drum that its lower-side will be slightly nclined toward its smaller or discharge end to facilitate the travel of the several ingredients through the drum. Adjacent the smaller or discharge end of the drum I secure, within the same, a disk 9 which fits closely against and is rigidly secured to the inner surface ofthe drum so as to form a gate. door, or partition to interrupt the flow of the materials from the drum. A sector is removed from. this disk or partition by cutting through the same upon radii thereof, and I prefer to make the cuts or incisions upon radii which-are at a right angle to each other although the incisions may intersect at other angles if desired. Upon one side of the partition I provide a deflector or guard 10. which extends from the disk along one edge of the sector formed by cutting the disk or partition, as just described, andon the opposite side of the partition I provide a deflector 11 which extends from the other edge or wall of the said sector. These guards ordeflectorsalso project in opposite directions from the disk or partition, that is to say. the guard 10 on the inner face of the partition projects toward the larger or receiving end of the drum, while the guard ordeflector 11 projects toward the smaller or discharge end of the drum.

Both deflectors extend to theconcave inner surface of the drum and are rigidly secured rotated in the direction indicated by the arrow marked a in Fig. 1. As the drum rotates the several ingredients will be agitated withinthe drum and will be thoroughly commingled and will travel toward the dischar e end thereof. If so desired, baffles or other forms of beaters or agitators may be provided within the drum,

but these well-known elements are not illustrated and are not essential to the successful operation of my improved mixer. As the mixture reaches the vicinity of the gate or partition, the rotation of the drum will bring the inner surface of the deflector 10 against the mixture and said deflector will then push the mixture aside and slightly toward the receiving end of the drum so that no material will reach and pass through the opening in the dish or partition. This action of the deflector will also aid in mixing the ingredients and will prevent the escape of unmixed material. After the mixing has been accomplished, the drum is rotated in the direction indicated by the arrow b and the outer surface of the deflector 10 will then enter the mixture and feed the same through the opening in the partition, so that it will pass beyond the same and escape through the smaller discharge end of the drum. The escape of the material through the discharge end of the drum will be facilitated by the outer face of the deflector 11 meeting the same and pushing it toward the outlet, as will be readily understood. When the drum is rotating in the direction indicated by the arrow (1 in mixing the ingredients, any material which may have been caught in advance of the deflector 11 will-be engaged by the said deflector and pushed back through the opening in the partition so as to be added to the ingredients being mixed. It will thus be seen that I have provided an exceedingly simple apparatus by which the mixing of abatchof concrete may be readily accomplished and the discharge of the mixed batch effected by merely reversing the retation of the drum and without requiring the use of any other instrumentalities. The partition forms a complete closure for the vdrum so that the material cannot flow directly through the drum but will be held therein until the rotation of the same is reversed for the very purpose of discharging its contents.

Having thus described my invention, what I claim is:

1. A concrete mixer comprising a rotary open-ended conical mixing drum having its lower side' substantially horizontal, the larger end of the drum being the receiving end and the smaller end the discharge end, a partition within said drum near the dis charge end of the same, the interior of the drum from the receiving end to the said partition being unobstructed and said partition having an opening therethrough at its edge, and deflectors upon opposite sides of the partition and extending in opposite directions therefrom at the sides of the opening therethrough whereby material in the drum will be prevented from escaping when the drum is rotated in one direction and will be discharged when the drum is rotated in the opposite direction.

2. A concrete mixer comprising a rotary open-endcd conical mixing drum. :1 partition therein near and forming a closure for the discharge end thereof and provided with a peripheral opening having intersecting sides extending from the point of intersection to the edge of the partition, a guard on one face of said partition extending. from oneside of said opening toward the receiving end of the drum, the free edge of, said guard being at the rear in the direc tion of travel in the mixing operation and a guard on the opposite face of said partition extending from the intersecting side of said opening toward the discharge end of the drum with its free edge at the front in the direction of travel in the mixing operation whereby material in the drum will be prevented from escaping when the drum is rotated in one direction and will be discharged when the drum is rotated in the opposite direction.

3. A concrete mixer consisting'of a conical rotary drum having its lower side substantially horizontal and open throughout the area of both its ends, a partition forming a closure for the discharge end of the drum and having an opening, whose sides intersect and extend from the point of intersection to the periphery of the partition. the partition being otherwise imperforate and diagonally disposed extensions of the intersecting sides of said openings forming 100 a passage communicating with the drum on i the opposite sides of the partition wherebv rotation of the drum in one direction will, retain the material therein and rotation in; the opposite direction will discharge the 195 material.

4. A concrete mixer consisting of a rotary drum, the discharge end of which is closed by a partition containing a diagonally disposed walled outlet and the interior 110 of which from its receiving end to said outlet is unobstructed, said walled outlet being disposed at the edge of the partition and the partition being otherwise imperforate.

In testimony whereof I afiix my signature 115 in presence of two witnesses.

GEORGE F. NYE. [L.S.] Witnesses: GEORGE BINGERT, F. TURNER. 

